Denial of service in Microsoft SQL Server

1) Input validation error

EUVDB-ID: #VU81827

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2023-36728

CWE-ID: CWE-20 - Improper input validation

Exploit availability: No

Description

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input in Microsoft SQL Server. A local user can pass specially crafted input to the application and perform a denial of service (DoS) attack.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Microsoft SQL Server: before 2014 SP3 CU4 12.0.6449.1, 2014 SP3 GDR 12.0.6179.1, 2016 SP3 GDR 13.0.6435.1, 2016 SP3 13.0.7029.3, 2017 GDR 14.0.2052.1, 2017 CU31 14.0.3465.1, 2019 GDR 15.0.2104.1, 2019 CU22 15.0.4326.1, 2022 CU8 16.0.4080.1, 2022 GDR 16.0.1105.1, 2014 SP3 CU4 12.0.6449.1, 2014 SP3 CU4 12.0.6449.1, 2014 SP3 CU4 12.0.6449.1, 2014 SP3 CU4 12.0.6449.1

OLE DB Driver: before 19.3.0002.0

Microsoft ODBC Driver for SQL Server on Linux: before 17.10.5.1, 18.3.2.1, 17.10.5.1

Microsoft ODBC Driver for SQL Server on macOS: before 17.10.5.1, 18.3.2.1, 17.10.5.1

Microsoft ODBC Driver for SQL Server on Windows: before 18.6.0007.0

CPE2.3

• cpe:2.3:a:microsoft:microsoft_sql_server:*:*:*:*:*:*:*:*
• cpe:2.3:a:microsoft:ole_db_driver:*:*:*:*:*:*:*:*
• cpe:2.3:a:microsoft:odbc_driver_linux:*:*:*:*:*:*:*:*
• cpe:2.3:a:microsoft:odbc_driver_macos:*:*:*:*:*:*:*:*
• cpe:2.3:a:microsoft:odbc_driver_windows:*:*:*:*:*:*:*:*

External links

http://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36728

Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected application in order to exploit this vulnerability.

The attacker would have to login to the system and perform certain actions in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.